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X-34

Cat. No. M8750
X-34 Structure
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Biological Activity

X-34 is a fluorescent, amyloid-specific dye. It binds at a different site than Pittsburgh Compound B and is a highly fluorescent marker for beta-sheet structures.

Chemical Information
Molecular Weight 402.4
Formula C24H18O6
CAS Number 215294-98-7
Solubility (25°C) DMSO: 25 mg/mL
Storage Powder          -20°C   3 years ;  4°C   2 years
In solvent       -80°C   6 months ;  -20°C   1 month
Conversion of different model animals based on BSA (PMID: 27057123)
Species Mouse Rat Rabbit Guinea pig Hamster Dog
Weight (kg) 0.02 0.15 1.8 0.4 0.08 10
Body Surface Area (m2) 0.007 0.025 0.15 0.05 0.02 0.5
Km factor 3 6 12 8 5 20
Animal A (mg/kg) = Animal B (mg/kg) multiplied by  Animal B Km
Animal A Km

For example, to modify the dose of Compound A used for a mouse (20 mg/kg) to a dose based on the BSA for a rat, multiply 20 mg/kg by the Km factor for a mouse and then divide by the Km factor for a rat. This calculation results in a rat equivalent dose for Compound A of 10 mg/kg.

References

[1] Jun Zhang, et al. Detection and Imaging of Aβ1-42 and Tau Fibrils by Redesigned Fluorescent X-34 Analogues

[2] Milos D Ikonomovic, et al. X-34 labeling of abnormal protein aggregates during the progression of Alzheimer's disease

[3] Jaroslaw Kanski, et al. Antioxidant activity of X-34 in synaptosomal and neuronal systems

[4] S D Styren, et al. X-34, a fluorescent derivative of Congo red: a novel histochemical stain for Alzheimer's disease pathology

[5] Y Koganei, et al. Orbital lipoma

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